20971420

素因数分解:

$2^2\times 5^1\times {\mathrm{1048571}}^1$

素因数の和:1048580

約数の個数: 12

約数和(自身を含む): 44040024

約数和(自身を除く): 23068604

約数列:

[1, 2, 4, 5, 10, 20, 1048571, 2097142, 4194284, 5242855, 10485710, 20971420]

約数ペア:

[(1, 20971420), (2, 10485710), (4, 5242855), (5, 4194284), (10, 2097142), (20, 1048571)]